Improvement in bark-mills



i -Idittedg giet-atea," l

To all whom it may eoiwera:l v v Be lit known that I-,RoBnm H. SH'ULzrrs, of El- 1 ienville, in the 'county of Ulster and 'State of New of reference markedtheron.

` York,have'inveritedan'Improvenient in Bark-Mills; and Ido hereby declare that the following is a full, l clear, and ekact description thereof, reference being had to the accompanying drawings and to the letters Drawings.

Figurel s-an elevation of my improved mill.

Figure 3 is a `bottom view of the revolving cone, and the spider upon which it rests, andalso of the l stationary ring withincs'aid'revolving cone. i Figure 4 is a'sectirmal elevation'of the -n} iper:cone,

` 2 ring, around which the ,usual grinding cone revolves,

i such ring being made stationary, as a consequenceof 1wliich`I am enabled tolargely increase the grinding surface of the `rnill,as.will be more fully set forth hereinafter.v l i A, iii thc drawings, refei'sto the shell or casing of fthe mill, which may be, of any required size, but is best when made of similar form to that shown in the vdrawings. p

I `Upon the upper portieri of its'interior surface it is `to beprovidedwith serrated projections or; vteeth,.: is i'sliown,for the purpose of breakingthe bark' `as it is .iiitroduced intothe mill, while from its lowerfend there extends upwa1'd,`upon its inner surface, series )broken bythe coarser ones, comeV in contact with these, they shall be reduced in size to the extent rel qniretljbiuse in `the preparation of leather' for market:V f

B refers to a shaft which passes vertically through j 4the mill, and to which the revolving cones are attached;

` This shaft may be connected with and moved by any motor wliichis arranged to drive it. p C C refer to cross-trees or bars, which are attached to lugs formed upon the outer surface of the case at they form bearings.,

D refers to a' cone'which' has, upon 'its outer' surface, a series of serrated projections or teeth, corres- Leners Patent No.' 103,246, dma May 17,1870.

Figure 2 is a sectional elevation, partly in section,Y showing the coarse teeth for crushing `the bark, the f ievolvingcones, and tlie'stationary ring 4for completl'ing tlieoperationof grinding.

`Corresponding letters referto `kmrresponding' pai-ts `each end thereof, their centerbeing proyidedwith apertures forthe reception of the shaft B,,fo r which' O Y l patent emitirse.

.e-noBERTH. sHULTIs, or ELLENVILLE, NEW YORK.

-mom 11m'naovniifmn'r 1N BARR-MILLS.

ilThe Schedule referred to in .these Letter-s :Patent and making part of the same.

. i I I i pending to those np'on the interior of the case in that tionary ring as to prevent the bark and thev like 'fiom getting in-between said parts, thus interieringfwith the free m'ovementof cone and beveled ring upon the shaft B. -v

E refers to a 4stationary ring, which has upon its upper end a series of projectingarnis, by which l it is secured centrally wit-hin the case o'r shell A. A

The upper portionoftliis ring, and for some distance below the lprojecting arms, is smooth upon both its outer aiidinner surfaces, but, near its lower end and upon its outer surface, it is provided wit'hprojea: tions or teeth, similar in form and size to those upon the-lower portion of the case of the mill.

Thesev -teetli extend upward for a greater or lesser distance, in proportion to the dimensions of the mill,

they' being designed to act in conjunction with those upon the revolving cone in completing the operation of grinding such portions of =the bark as may pass be- 'tween it and suoliV c'one in falling from the upper por tionof the mill.

F refers to a revolving conical ring or cone, which hasnponits lower end a series of cross-arms, with a B, 'so as toeause it to rotate therewith.

yThe position of this conical ring is between the s hub in or at their center lfor attaching itl to the shaft outer surface of the stationary ring E and the-interior of the case A. It is provided, 'both upon its exterior and interior surfaces, with proJections corresponding to thosenpon the case A andstationary Yring`E, as a consequence of which any pieces of bark which may fall between it and the case will be ground, and thus it willbe seen two grinding-surfaces aie provided for the finishing operation in bark grinding, the result of which is that a largely-im creased amount `of bark can be ground in a given length of time. l'

I 'do not claim the several devices above described but Patent,`is-

Inthe bark-mill herein shown, au improved arrangement of parts, consisting of the casing A, shaft B, revolving breaking-cone D, stationary ring E, and

revolving grinding-ring F, 'constructed specially as shown, andarrangcd to operate in the manner setl forth anddescribed. l

In testimony whereof I have hereunto subscribed myname in the presence` of two subscribing witnesses.

Witnesses:

G. M. Nieiriisox,

JN0. MCELHONE.'

ROBT. s HULTfs.

separately, nor any general combination of the same;

Vliat I do claim, and desire to secure by Letters 

